Well, I've written an Mpreg fic before... completely stupid, all of it. It's hilarious - not finished, probably wont ever be for that matter, but damn, it's funny. It's Aragorn/Legolas, and Legolas is the pregnant one - suffering from morning sickness and moodswings... it's all very, very silly.

I cant think of a way to write a serious Mpreg... you could always just try to play it completely straight (if you excuse the pun), taking it quite seriously, but ending up with a funny fic because of that...

As far as the, ah, mechanics go... C-Section, anyone? Sex can be normal gay sex, but it'd have to be a C-Section for the birth (if you're going to go that far, of course), or the baby could come out more... interesting orifices O.o; *coughs*

I'm not helping, am I? LOL